My son was born when I was only 18 and although I love him, I do wish that I had waited until I was older to have a baby. Having been so young raising him I can see some of the emotional scars he has just because I hadn't been more mature and had more answers....yes, I know, almost everyone thinks they are mature at 18. There are so many considerations to bringing up a child. You are making a LIFETIME commitment to be everything to another person...especially one so innocent & fragile. You say that people put you down & generally dis you... well it would only get worse with a baby. I am now 58 years old and wouldn't wish that my 2 kids were not born but just wish I had been older & more prepared for everything that goes with it.
I had always looked after & babysat other kids since I was around 11...but they are so much more responsibility when they are yours 24/7. When I was 14 my much older sister went to hospital to have her 5th child...I took a week off school and took care of her other 4 kids & housework & meals, laundry etc. ...So I thought I had some idea of what it would be like (her youngest was 2 years old and oldest around 7-8). Believe me it was nothing like my 'playing house' with her kids!
Please reconsider having a baby when you are so young. Enjoy your youth..go have some fun with your boyfriend... go to parties and be 18. Don't try to rush it. I mean all this in the spirit of having been a very young mother myself. If I were your mother I would give you the very same advice. Good luck.